UNIX超级工具 （第二版，上下卷）

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• !! repeats the last command. !: repeats the last command. This form is used if you want to add a modifier (Section 28.5) like the following: % echo xy xy % !:s/xy/yx echo yx yx The second ! was left out. !so repeats the last command that starts with so. !?fn? repeats the last command that has fn anywhere in it. The string could be found in an argument or in the command name. This is opposed to !fn, in which !fn must be in a command name. (The last ? need not be there. Thus !?fn means the same thing.) !34executes command number 34. You can find the appropriate history number when you list your history using the history command, or by putting the history number in your prompt (Section 4.3). !! & adds an ampersand (&) to the end of the last command, which executes it and places it... (查看原文)

  月入窗 2013-09-18 14:07:34